Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5171724 | Magnesia-alumina type spinel clinker and method of producing refractory by using same | Hitoshi Iwadoh, Takenao Hisamoto, Yoshio Yasuda, Katsunori Itoh | 1992-12-15 |
| 4298391 | Hot repair gun refractory mix for a lining refractory | Masahiro Hayase, Hiroyuki Sugimoto | 1981-11-03 |